Risk and Resilience Analysis for Highway Assets

2017 ◽  
Vol 2604 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Elizabeth Kemp Herrera ◽  
Aimee Flannery ◽  
Michael Krimmer
Keyword(s):  
Asset Management ◽  
Transportation Systems ◽  
Project Planning ◽  
Innovative Technology ◽  
Risk And Resilience ◽  
Department Of Transportation ◽  
Asset Protection ◽  
Highway Transportation ◽  
Potential Benefits ◽  
American Society

Transportation agencies own tens of thousands of assets, providing essential mobility and economic services to the communities they serve. Moving Ahead for Progress in the 21st Century and subsequent legislation require asset managers to implement risk-based asset management. A discussion is presented on the application of one quantitatively based framework—the American Society of Mechanical Engineers Innovative Technology Institute's Risk and Resilience Analysis and Management for Critical Asset Protection—for analyzing risks posed by physical threats to highway transportation systems and assets. The application of this particular risk analysis framework by the Colorado Department of Transportation following the 2013 floods is recounted; the analysis was used to support requests for federal emergency response funding. Finally, the potential benefits of such analysis for highway transportation project planning and strategic planning are also examined.

scholarly journals The Effect of IntelliDrive on the Efficiency of Highway Transportation Systems

2011 ◽  
Vol 2011 ◽  
pp. 1-11 ◽  
Author(s):  
Mohammad Nekoui ◽  
Hossein Pishro-Nik ◽  
Daiheng Ni
Keyword(s):  
Road Safety ◽  
Real Life ◽  
Transportation Systems ◽  
Mathematical Framework ◽  
Mixed Traffic ◽  
Department Of Transportation ◽  
Lane Changing ◽  
Traffic Conditions ◽  
Highway Transportation ◽  
The Us

Recently, the IntelliDrive initiative has been proposed by the US Department of Transportation (USDOT) to enhance on-road safety and efficiency. In this study, we provide a mathematical framework which predicts the effect of such technologies on the efficiency of multilane highway systems prior to their real-life deployment. Our study shall encompass mixed traffic conditions in which a variety of assisted, automated and unequipped vehicles coexist. We show that intervehicular communications improves the flow of vehicles by reducing the perception-reaction (P-R) times of drivers and, in some cases, allowing for more efficient lane-changing operations. As we shall see, unlike the latter, the former effect of IntelliDrive on driver P-R time is always there, regardless of the specific traffic conditions.

scholarly journals Graceful extensibility in asset management: extending the capacity to adapt in managing cyber-physical railway systems

2021 ◽  
Author(s):  
Jan-jaap Moerman ◽  
Jan Maarten Schraagen ◽  
Jan Braaksma ◽  
Leo van Dongen
Keyword(s):  
Asset Management ◽  
Adaptive Systems ◽  
New Technologies ◽  
Autonomous Driving ◽  
Cyber Physical Systems ◽  
Transportation Systems ◽  
Rolling Stock ◽  
Railway Transportation ◽  
Physical Systems ◽  
Railway Systems

AbstractGraceful extensibility has been recently introduced and can be defined as the ability of a system to extend its capacity to adapt when surprise events challenge its boundaries. It provides basic rules that govern adaptive systems. Railway transportation systems can be considered cyber-physical systems that comprise interacting digital, analog, physical, and human components engineered for safe and reliable railway transport. This enables autonomous driving, new functionalities to achieve higher capacity, greater safety, and real-time health monitoring. New rolling stock introductions require continuous adaptations to meet the challenges of these complex railway systems as an introduction takes several years to complete and deals with changing stakeholder demands, new technologies, and technical constraints which cannot be fully predicted in advance. To sustain adaptability when introducing new rolling stock, the theory of graceful extensibility might be valuable but needs further empirical testing to be useful in the field. This study contributes by assessing the proto-theorems of graceful extensibility in a case study in the railway industry by means of adopting pattern-matching analysis. The results of this study indicate that the majority of theoretical patterns postulated by the theory are corroborated by the data. Guidelines are proposed for further operationalization of the theory in the field. Furthermore, case results indicate the need to adopt management approaches that accept indeterminism as a complement to the prevailing deterministic perspective, to sustain adaptability and deal effectively with surprise events. As such, this study may serve other critical asset introductions dealing with cyber-physical systems in their push for sustained adaptability.

Composite Sleeve Repair in the North American Regulatory Environment

2020 ◽  
Author(s):  
Xavier Ortiz ◽  
Dan Jungwirth ◽  
Yashar Behnamian ◽  
Hossein Jiryaei Sharahi
Keyword(s):  
Maximum Stress ◽  
Oil And Gas ◽  
Hazardous Materials ◽  
Regulatory Environment ◽  
Department Of Transportation ◽  
Regulatory Requirements ◽  
The North ◽  
Industry Standards ◽  
American Society ◽  
The U.S

Abstract Composite sleeve repairs have been used in the pipeline industry for the last 25+ years. Fiberglass sleeves (e.g., Clock Spring®) were initially introduced in the market and are still being used as a proven pipeline repair method. For the last 15+ years, new composite materials have been introduced in the industry to provide a wider variety of repair options depending on the type of imperfections being repaired. Regulations in the U.S.A. and Canada share some requirements regarding design, installation, testing, and assessment of composite sleeve repairs. The U.S. Department of Transportation (DOT) through the Pipeline and Hazardous Materials Safety Administration (PHMSA) recommends the use of repair methods consistent with industry standards. The 2019 version of the Canadian CSA Z662 Oil and Gas Pipeline Standard includes requirements for testing and qualification according to the American Society of Mechanical Engineers (ASME) regulation PCC-2 or ISO/TS 24817, and requirements for conducting an engineering assessment to determine the subsequent maximum stress on the pipe sleeve. This paper compares the regulatory requirements for pipeline composite sleeve repairs in the U.S.A. and Canada; it describes some of the options for composite sleeve repair, and reviews engineering assessments of methodologies for composite sleeve repair.

A Transportation-Efficient Land Use Mapping Index

2005 ◽  
Vol 1902 (1) ◽  
pp. 134-144 ◽  
Author(s):  
Anne Vernez Moudon ◽  
Sarah E. Kavage ◽  
Jean E. Mabry ◽  
D. W. Sohn
Keyword(s):  
Land Use ◽  
Block Size ◽  
Transportation Systems ◽  
Department Of Transportation ◽  
Local Planning ◽  
Research Findings ◽  
System Data ◽  
Quantitative Analyses ◽  
Washington State Department ◽  
Fine Resolution

Land use and transportation are linked by complex, yet identifiable, relationships. Tools are needed to formalize this relationship and to take it into account when decisions are made about urban and suburban transportation systems. This paper reviews foundational concepts of performance measures of metropolitan transportation systems. It offers a rationale for the types of tools needed to measure and assess land use and transportation system efficiency. One tool being developed by the Washington State Department of Transportation–-the Transportation-Efficient Land Use Mapping Index (TELUMI)–-illustrates how research findings can be applied in metropolitan transportation planning. TELUMI uses cartographic modeling (CM) techniques and parcel-level geographic information system data. The fine resolution of the data measures microscaled land use conditions associated with travel patterns in built-up areas. CM generates maps of zones in a region that match land use conditions with travel behaviors. Zones are defined by land use variables, such as density of activities, presence and agglomeration of destinations, block size, and transportation infrastructure attributes. CM also performs advanced quantitative analyses of map attributes, and it is effective with lay and professional audiences. TELUMI's use of individual land use variables makes it possible to target intervention strategies, such as augmenting density or building sidewalks, and to evaluate their effectiveness in improving transportation efficiency. TELUMI assists transportation and local planning authorities in allocating transportation investments appropriate to multimodal travel.

Sentinel Lymph Node Biopsy and Management of Regional Lymph Nodes in Melanoma: American Society of Clinical Oncology and Society of Surgical Oncology Clinical Practice Guideline Update

2018 ◽  
Vol 36 (4) ◽  
pp. 399-413 ◽  
Author(s):  
Sandra L. Wong ◽  
Mark B. Faries ◽  
Erin B. Kennedy ◽  
Sanjiv S. Agarwala ◽  
Timothy J. Akhurst ◽  
...  
Keyword(s):  
Lymph Node ◽  
Sentinel Lymph Node ◽  
Clinical Oncology ◽  
Surgical Oncology ◽  
Breslow Thickness ◽  
Clinicopathological Factors ◽  
Careful Observation ◽  
Randomized Controlled ◽  
Potential Benefits ◽  
American Society

Purpose To update the American Society of Clinical Oncology (ASCO)-Society of Surgical Oncology (SSO) guideline for sentinel lymph node (SLN) biopsy in melanoma. Methods An ASCO-SSO panel was formed, and a systematic review of the literature was conducted regarding SLN biopsy and completion lymph node dissection (CLND) after a positive sentinel node in patients with melanoma. Results Nine new observational studies, two systematic reviews, and an updated randomized controlled trial of SLN biopsy, as well as two randomized controlled trials of CLND after positive SLN biopsy, were included. Recommendations Routine SLN biopsy is not recommended for patients with thin melanomas that are T1a (nonulcerated lesions < 0.8 mm in Breslow thickness). SLN biopsy may be considered for thin melanomas that are T1b (0.8 to 1.0 mm Breslow thickness or < 0.8 mm Breslow thickness with ulceration) after a thorough discussion with the patient of the potential benefits and risk of harms associated with the procedure. SLN biopsy is recommended for patients with intermediate-thickness melanomas (T2 or T3; Breslow thickness of > 1.0 to 4.0 mm). SLN biopsy may be recommended for patients with thick melanomas (T4; > 4.0 mm in Breslow thickness), after a discussion of the potential benefits and risks of harm. In the case of a positive SLN biopsy, CLND or careful observation are options for patients with low-risk micrometastatic disease, with due consideration of clinicopathological factors. For higher-risk patients, careful observation may be considered only after a thorough discussion with patients about the potential risks and benefits of foregoing CLND. Important qualifying statements outlining relevant clinicopathological factors and details of the reference patient populations are included within the guideline. Additional information is available at www.asco.org/melanoma-guidelines and www.asco.org/guidelineswiki .

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